Tree propagation

I had to cut down a walnut tree, which I'm quite sad about, but it's coming from under the concrete of the fence post so I couldn't get the roots out.
I hadn't got round to cutting it right back and didn't think it would sprout, but as it did, I decided to try and take a couple of cuttings - would it be possible from this?
I hadn't got round to cutting it right back and didn't think it would sprout, but as it did, I decided to try and take a couple of cuttings - would it be possible from this?

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Anyway, on a recent garden group visit to a garden where chappy is mad about grafting there was much discussion about the best subjects and the best techniques. I concluded cuttings would be best for me and found this info -
https://www.ehow.com/how_7977835_grow-walnut-tree-cutting.html
Your new shoots look very healthy so give it a go but leave that top pair of shoots to grow on, just in case, so you can try again next year.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
Another friend in the garden group has a walnut tree grown from nuts gathered on a garden visit 17 years ago. It started fruiting 2 years ago.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
Yes I know! There's one over the road which is pushing up the pavement.. way too big for my tiny garden, sadly. We also had one in a horse field, it was bloody massive!
I feel I owe this one a chance.
It would be at the bottom of my list if I was to plant a tree again. You don't even get much Autumn colour, although the catkins looking beautiful in the odd years when we get them.
I think they're gorgeous trees, even in winter. I'd love to see a pic of your tree.